Seven people held in connection with former RJD leader Shakti Malik murder case in Purnia.
He was shot dead by three masked men at his residence a day after he has been expelled from RJD on October 04.
Speaking on this SP Vishal Sharma said, "We have recovered a diary, according to which, he gave loans to people.
We were told that he used to make borrowers sign blank cheques and blank stamp papers to blackmail them later.
Malik used to levy heavy interests, making it difficult for borrowers to repay.
On Oct 3, he made an accused sit for 3-4 hrs and pressurised him to accompany him to Patna amid election season.
Frustrated, they decided to kill him."
